ments having a pulley arrangement attached to the breast 

 instead of to the back wherein a more direct pull would be 

 exerted but tending to top heaviness. 



To control the elbow movement from the breast is ob- 

 viously simple, but the greater distance to the terminal bones 

 of the wing introduces complications which are overcome 

 by an automatic arrangement, most ingenious. The two 

 bones of the forearm, radius and ulna, have a backward and 

 forward sliding movement. There are two knobs on the 

 upper arm bone at the elbow which fit into a cup on each 

 of the forearm bones. The terminal of the wing or pinion 

 is securely fastened to the other ends of these forearm bones. 

 When the breast muscles straighten the wing at the elbow 

 joint, a knob comes in contact with one of the forearm bones 

 and pushes or slides it forward, causing the pinion bone to 

 automatically straighten. When the wing is folded [the 

 other knob pushes on its respective bone causing the pinion 

 to resume its former folded position. 



These are but a few of the myriad examples of nature's 

 wonderful devices, by whose adaptability and perfection the 

 eternal fitness of things is made manifest. 



BIRD NOTES AND NEWS 



MIGRATION NOTES FROM WATERVILLB 



The first birds to arrive from the south were seen on March 

 11th when Robins and Bluebirds appeared. The same day a 

 Killdeer was seen flying over a field near the city. Song- 

 sparrows, Juncos, and Purple Finches arrived on the next 

 day, March 12. A second wave appeared March 31st,- April 2. 

 In this wave were flocks of Fox Sparrows. Contrary to re- 

 ports from other parts of the state these sparrows seemed 

 very abundant. They were first seen on March 30th and 

 remained about a week. 



From April 19th on birds increased rapidly in numbers. 

 The migration reached its height May 15-1 8th. Between these 

 dates 21 new arrivals were reported. Some of the more 

 interesting records follow. 



The first Startlings to be reported from this section ap- 

 peared about the middle of March. Two or three pairs 

 nested in Winslow. 



A flock of nineteen Cedar Waxwings were seen March 



54 



